20191203 Site Shut Down

Site was shut down at 16:15 CST 12/03/2019.

20191018 Monthly Check

No leaks or smells
Pumps clear
No water in charcoal canisters
No condensation in the sample lines
Changed Teflon Filters

NO flow: >1
NO pressure: 250
NO PMT temp:
NO alarms: converter temp
NOx Flow: 0.5-.75
NOx pressure: 125-250
NOx PMT temperature:
NOx alarms: converter temp
O3 flow: A:1.51, B:0.70
O3 pressure: 727
O3 alarms: FLow A high, intensity b low
NO2 flow: 1.25-1.50
NO2 pressure: 250
NO2 PMT temp:
NO2 alarms Cooler temp high, converter temp low, sample flow high
CO flow: 0.50
CO pressure: 741
CO alarms: none
NO high: 200     NO low: 42
NO2 high: 1600     NO2 low: 34
Co2 High: 1250        CO2 low: 52
CO high: 1700      CO low: 40

No pests

20191016 CO Diaphragm Replaced

CO flow was low during morning check.
Replaced diaphragm with a used one from 403 because we are waiting on more to be shipped

20191011 Ozone instrument sample line fitting

Ozone was not reading normally, disconnected and reconnected sample line resolved issue, instrument had been sampling inside the trailer (60ppb).

20191010 Ozone pump failure.

On arrival temp inside trailer was very cold, temp was at 67F set to 60F. Terailer smelled heavily of Ozone. Door was opened and AC was set to 80F. (Eugenia) Replaced Ozone instrument diaphragm, instrument was turned back online.

20190930 CO Fans Replaced

CO instrument was shut down at 12:13 CST to replace bench fan, and exhaust fan. 

Instrument was restarted at 13:01 CST. New fans are slightly lower wattage, they no longer had same model of fans for sale online. Wires for the fans had to be clipped to remove connector, and were connected to fans using screw terminal blocks. 

20190924 NOy Pressure Spike

Over the weekend NOy pressure gradually increased to ambient pressure until Sunday when pressure suddenly dropped back to normal. Tuesday Daniel Bahrt went on site to investigate potential cause. The exhaust line from the NOy pump had some droplets of hardened residue inside and looked like it had been blocked off then blown back out. Ozone Catalyst at the end of the pump may need to be replaced.

20190924 Site Check

Post tropical storm check
No signs of water damage/leaks
NO-less than 200
NO2-1600
CO- 1700
Anemometer working

20190903 CO Fan failure

Started receiving high temperature alerts, trailer temp was fine, co instrument had temp bouncing from 35C to 45C. Upon opening the instrument all 3 fans were not working properly. The bench fan was spinning slowly (like a stepper motor) and was visually cracked open. The exhaust fan was also clicking as it slowly ran. All 3 fans were hot and the instrument was warm to the touch. The instrument was shut down and restarted at 15:22CST to test. Bench fan was determined to be dead and was replaced by a fan from an O3 analyzer instrument located in 403. 2 Fans need to be ordered and installed to replace the clicking exhaust fan and the bench fan. The instrument has not had all fan screws reinstalled, but was restarted in maintenance mode. 

20190902 AC Outage

High instrument temperatures indicated possible AC outage. When Daniel arrived onsite temperature inside the trailer was 114F and AC was not running. The door was opened to let the air cool and HVAC was called. HVAC was able to arrive that day so it was decided not to shut down the site. HVAC said that they replaced an alternator. Daniel stopped by again later to verify the temperature had dropped. Inside temp was 94F and cool (not cold) air was blowing from the vents.

20190808 Computer Issue

8/7/2019 Computer screen was not working properly. Brought new VGA cable that fixed the problem

20190807 Site Visit

No pests/leaks
NO- 250 psi   NO2-1600 psi    CO-1600 psi
CO-no alarms; Dynamic Gas-no alarms; NO-converter temp low;NOy-converter temp low
Changed teflon filters

20190718 NO Zero air Valve troubleshoot

Zero air valve had previously been connected to the AUX connection on the motherboard, this was wrong and moved to the SAMPLE connection after verifying with multimeter. Daqfactory did not have proper sequences or commands to zero NO. The sequence "Auto_Zero_NO" was re-written with proper commands for the instrument and was turned on. The sequence is not currently changing the baseline, and that will have to be written in there when next available.

20190611 Labjack Not Found

Labjack not found error identified by Sergio as potential cause of no spans
USB hub found to be malfunctioning (not all green lights on)
USB hub power cycled, seems to have fixed error.

**NOTE- USB hub was warm to the touch**

2019528 LT NOy PMT cooler temperature stable after AC fan was set to on instead of auto on Friday, 5/28/19

20190509 Changed slopes on NO, NOx and NOy with local multipoint calibration

20190509 Site check (refer to notes)

- changed filters on NO, NOx, NOy, CO, and Ozone
- checked NOy converter  - 320 deg C
- checked instrument alarms: Usual not applicable alarms were seen except for the Ozone instrument had a low intensity alarm

20190509 Performed multipoint calibration on NO, NOx and NOy

20190509 Replaced NOy vacuum pump with new Labaport pump

20190508 NOy instrument was put in maintenance mode (cell pressure is high)

20190315 LT quarterly calibrations

Performed quarterly calibrations for CO, O3, NO, NOx, NOy
Replaced Teflon filters

20190313 LT NOx instrument

Re-installed NOx instrument and turned it on.

20190311 NOY pump

Sergio - Replaced NOy  Vacuum pump with *****

20190306 Restarted site and did maintenance

• Replaced IR source and drying tube on the CO instrument
• Turned O3, CO, NO, NOy, and calibrator on in preparation for the Ozone measuring season.
• Replaced Vacumbrand pump
• Unplugged BIC plug in the inlet box
• CO= 1640 psi
• NO= 350 psi